Apparatus for forming sockets for drop rings



G. A. LYON 3,007,229

3 Sheets-Sheet 1 APPARATUS FOR FORMING SOCKETS FOR DROP RINGS Nov. 7,1961 Filed June 27, 1955 IZFE 27.227 I" h George A/berf Lyazz 2: L 7 MW, [r 75 Nov. 7, 1961 G. A. LYON 3,007,229

APPARATUS FOR FORMING SOCKETS FOR DROP RINGS Filed June 27, 1955Sheets-Sheet 2 F .4 57.5 5, 5

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T INGS Era 11 U 2'" Geozye A/bez" 012 United States Patent 3,007,229APPARATUS FOR FORMING SOCKETS FOR DROP RINGS George Albert Lyon, 13881W. Chicago, Blvd., Detroit 28, Mich. Filed June 27, 1955, Ser. No.518,323 2 Claims. (Cl. 29-1.21)

This invention relates to a method and an apparatus for forming hangersockets.

More specifically this invention relates to a method and an apparatusfor forming moisture proof bomb hanger sockets in the wall of the bombso as to provide means by which the bomb may be suspended from theunderside of the wing of an airplane or the like.

At the present time there is considerable attention being given by somemanufacturers in developing a new type of streamlined low drag bomb.This particular bomb is of the 500-2000 lb. type. Due to the fasterspeeds now being developed by presently existing airplanes and thehigher altitudes now attainable by them, the conventional bombconstruction must be streamlined so as to permit precision bombing underthese more exacting conditions.

Accordingly it is an object of this invention to provide a novel methodand an apparatus so as to facilitate the manufacture of streamlined lowdrag type of bombs.

Another object of this invention is to providea new and improved methodand apparatus for forming bomb hanger sockets in the wall of a bombcasing which may be cheaply and efliciently carried out'so as to lenditself to large scale production techniques.

Still another object of this invention is to provide a novel method andapparatus by which the large bombs may be provided with hanger socketsthrough the use of presses capable of developing the required punchingpower.

A further object of this invention is to provide a novel method andapparatus which is capable of simply converting a rivet blank to a rivetwhile at the same time attaching the rivet to the wall of a bomb.

A still further object of this invention is to provide a novel methodand apparatus which is capable of forming a plurality of bomb hangersockets in the wall of the bomb in the same operation.

Yet another object of this invention is to provide a novel method andapparatus in which bomb hanger stud sockets may be simply riveted to thewall of a bomb thereby eliminating other more cumbersome techniques nowemployed by manufacturers.

Another and still further object of this invention is to provide a novelmethod and apparatus which is capable of producing a moisture proof studsocket and bomb wall connection.

In accordance with the general features of this invention there isprovided in a method of forming bomb hanger studs on the wall of a bombcasing, the steps of punching the wall of the bomb to form an aperturedwall portion, inserting a die member within the casing, inserting arivet slug through the aperture resting same on the die member, andcompressing the slug to mushroom and firmly secure same on the radiallyinner and outer sides of the casing wall to form a bomb hanger' stud.

Other features relate to the provision of one form of apparatus adaptedto carry out my method and which includes wedgingly cooperable die oranvil members insertable into the interior of the bomb casing for use inthe riveting operation.

Other objects and features of this invention will more fully appear fromthe following detailed description taken ice in connection with theaccompanying drawings which illustrate a single embodiment thereof andin which:

FIGURE 1 is a longitudinal cross-sectional view with parts in elevationshowing a bomb casing having apparatus therein for effecting my novelinvention;

FIGURE 2 is an enlarged cross-sectional view taken on the line II-II ofFIGURE 1;

FIGURE 3 is an enlarged fragmentary cross-sectional view similar toFIGURE 2 but showing an early step in the carrying out of'my novelmethod and a portion of the press for effecting same;

FIGURE 4 is an enlarged fragmentary cross-sectional view taken on theline IV-IV of FIGURE 3 showing in greater detail an early step in mynovel method and novel apparatus for carrying out same and with theapparatus in a press;

FIGURE 5 is an enlarged fragmentary cross-sectional view similar toFIGURE 3 but showing a later step in my novel method and other apparatusfor carrying out same;

FIGURE 6 is an enlarged fragmentary cross-sectional view similar toFIGURE 5 showing a still later step in my novel method and the novelapparatus for effecting same; J

FIGURE 7 is an enlarged fragmentary cross-sectional view similar toFIGURE 6 showing a still later step in my novel method and the novelapparatus for carrying out same; and

FIGURE 8 is a plan view of a bomb casing showing the stud sockets in acompleted state.

As shown on the drawings:

The reference character 10 (FIGURE 8) indicates generally one of aseries of bomb hanger stud sockets which are riveted to the cylindricalwall 11 of the bomb casing 12. It will be appreciated that after thebomb hanger stud sockets have been. formed in the wall of the bombcasing 12 that the other component parts of a completed bomb may be thenassembled with the casing 12 including the tail assembly, the powercharge and the war head (not shown).

In order to aid in the understanding of my invention I shall now proceedin detail to describe same following. generally the steps carried out inmy novel method along with a description of my novel apparatus aseffecting each step.

As seen in FIGURE 1, a pair of slidably adjustable interlockingcomplementally beveled-type die or anvil members 13 and 14 are disposedin the casing and have opposite ends projecting through thelongitudinally opposed openings 15 and 16 of the bomb casing 12. Theymay be inserted in the casing 12 through end opening 16 and arethereafter adjustably assembled within the confines of the casing wallby means of a tongue and socket connection indicated generally at 17(FIGURES l and 2) connecting the opposed inclined sliding surfaces 18and 19 of the die members 13 and 14. The members 13 and 14- not onlyserve as a lower die member in my method but also can support the casing12.

Each of the wedging die members 13 and 14 have a wedging arcuatelycurved surface 20 and 21 (FIGURE 2) which engages in an opposed relationagainst the radially inner surface 22 of the cylindrical wall 11.

The socket connection 17 is utilized to minimize radial and axialslippage of the die members 13 and 14 relative to one another and inaddition, serves to bring the respective .arcuately curved surfaces 20and 21 of the die members 13 and 14 into firm nested engagement with theinner surface 22 of the bomb wall 11 so as to minimize any undesireddistortion of the bomb wall as a consequence of working the cylindricalwall 11 as hereinafter will be more evident.

Provided on the upper die member 13 are two dished Patented Nov. 7, 1961shaped slots or female dies 23 and 24. The larger female die 23 issuitably capable of assisting in the formation of a plurality of sockets10, three as shown. The smaller female die 24 is adapted to assist inthe forming of a single socket 10. Due to the closeness of the spacingof the sockets required under international convention, and for reasonsof manufacturing expediency, I have found it convenient to utilize alarger type female die 23 which is capable of assisting in the formationof three sockets 10 at the same time. It will be appreciated that all ofthe sockets could be separately formed by the use of a plurality of diessimilar to female die 24 or all of the sockets 10 could be formedtogether by the use of a die similar to female die 23.

The die members are adjustably inserted in overlapped and wedgedrelation within the bomb casing 12 until the aforementioned dies 23 and24 are positioned in a predetermined location relative to thecylindrical wall 11. This predetermined location preferably constitutesthe center of mass area of the bomb so that the bomb may be suspendedfrom the underside of a plane in such a man ner that there is a uniformdistribution of mass relative to the hanger elements (not shown).

In the illustrated die arrangement, three vertical or transverseopenings or bores 25 extend completely through the die member 13, onefor each socket to be formed. The female die 24 has a single bore 25since it is to assist in the formation of only one socket It The nextstep of my novel method after the assembly of the dies 13 and 14 withinthe bomb casing 12 is the insertion of the bomb or casing 12 into asuitable press, a part of which is shown in FIGURES 3 and 4- in the formof a hold-down die or a countersinking and punching holddown member 26.It will be appreciated that the die members 13 and 14 may be assembledwithin the bomb casing 12 before or after being placed in the press asdesired; and that the press may be any conventional double toggle ordouble acting hydraulic press.

After the bomb casing 12 has been positioned in the press,rthe hold-downdie 26 having male die members or projections or countersinking tools 27and 28 are compressed against the outer surface of the cylindrical wall11 at 29 and 30 and the wall thereof is dished or upset radiallyinwardly into the female dies 23 and 24 carried by the die member 13 toform two inset dished pockets 31 and 32, respectively, in the wall 11.

It will be noted that except for the male die members 27 and 28 theouter arcuate surface of the holddown external member 26 is adapted toengage nestingly with the cylindrical outer surface of the wall 11 toprevent any undesired deformation thereof.

Thereafter, press rams or punching tools 33 of predetermined variablediameters as desired are each contemporaneously urged radially inwardlythrough vertical bores 34 in die member 26 and inset pockets 31 and 32in the bomb wall 11 thereby punching out suitably four openings or slots35 from the wall 11. Since the bores 25 and 34 (FIGURES 1 and 3) are invertical alignment each of the punched out slugs S is urged into thechutes 25 and may be readily removed as the die member 13 is withdrawnfro the interior of the casing 12 after the rams 33 are retracted. Inother words, the slugs S drop out of the chutes after the die members 13and 14 are disengaged. It is in this manner that the slugs are precludedfrom jamming and causing ditficulty in their removal.

In the next step of my invention, structurally different die andhold-down members 13a and 26a, respectively, are utilized as shown inFIGURES S, 6 and 7. The member 13a comprises a riveting and socketforming beveled die member and the member 26a comprises a riveting andsocket forming holdd'own member. The die member 13a is adjustablymountable on the die member 14 in place of member 13 but in the samemanner as in the case of die member 13.

The principal difference in the construction between the die member 13and the die member 13a is that in each case where bores 25 were formerlyemployed in the die member 13, sockets 36 having radially projectingoutwardly inclined or tapered walls 37 are now utilized in the diemember 13a.

With respect to the hold-down member 26a vertical bores 38 of reduceddiameter are now employed. These bores 38 are not only of a smallerdiameter than that of the bores 34 but are also adapted to haveprojecting therethrough rivet forming rams 39 (FIGURE 5). Anotherfeature of the hold-down member 2611 is that it is arcuate inconfiguration so as to be capable of snugly nesting with the outercylindrical surface 40 of the wall 11 and thereby prevent any undesireddeformation in the rivet forming operation (FIGURE 5 Since the formationof rivets in the respective sockets 36 is substantially the same in eachcase, the rivet forming operation has only been illustrated inconnection with the inset dished pocket 32 (FIGURES 5-7).

The next step of my novel method after the removal of die member 13 andthe insertion and adjustment of die member 13a along with thesubstitution of hold-down member 26a for member 26, is the insertion ofone end 41 of a preferably preheated previously annealed rivet blank orslug 42 through the slot 35 in the inset dished pocket 32 with the end41 resting in the socket 36 of the die member 13a. The other end 43 ofthe rivet blank 42 when the end 41 is in bottomed relationship with thesocket 36 projects radially outwardly beyond the confines of thecylindrical wall 11 (FIGURE 5).

A solder ring 44, preferably of a silver composition, is then slippedover the end 43 of the rivet blank 42 and bottomed on the inset annularshoulder 45 of the inset dished shaped pocket 32.

The hold-down member 260 which is carried by the press has portions ofit comprising riveting tools which are then brought into contact withthe rivet blank 42. It will be noted that the radially innermost concaveend of the ram 39 lies in the same plane as the lowermost concavesurface 46 of the hold-down member 26a so that the ram is utilized inthe forming of the rivet blank 42 into a rivet 42a (FIGURE 7). The ram33 was also usable in this same manner in aiding in the formation of thedished inset pockets 31 and 32.

The press is first actuated with the hold-down member 26a urgeddownwardly against the blanks 42 and the die members and 14 to compressand mold the rivet blank 42 into an intermediately formed rivet 42b(FIGURE 6).

It will be noted that the head portion 47 of the rivet 42b is mushroomedout in the inset pocket 32 with the shank 48 conforming to the dimensionof the hole or slot 35 and collapsed or mushroomed radially outwardlyunder the wall of inset pocket 32 beyond hole 35. Thus, the rivet blankhead 47 is interlocked with both sides or surfaces of inset 32 radiallybeyond hole 35 and also the solder ring 44 is flattened tightly intoposition about the rivet 42 on inset 32.

After the innermost surface 46 of the hold-down member 26a is broughtinto nesting engagement with the outermost surface of the cylindricalwall 11, ram or socket forming tool 39 is then forcibly urged againstand into the rivet 42b and a socket 50 is thereby formed in the rivet.As the socket 50 is formed, the metal of the rivet 42b is furtherdeformed from the position shown in FIGURE 6 to that of FIGURE 7 whereinit is forced into snug contact with the inner surface of socket 36 andinto tight contact with the under surface of inset 32. It will be notedthat the inset dished pocket 32 includes radially, inner and outer upsetsurfaces 51 and 52 which are both utilized as dies and steps in theformation of the completed stud socket 10.

As shown in FIGURE 7, the exterior surface of the rivet head 47 isconcavely cuiyed in the curved cylindrical plane of the outer surface ofcasing 11 so as not to detract from the streamlining of same.

The casing 12 is then removed from the press and the die members 13a and14 are disengaged and removed from the interior of the bomb casing 12.

Thereafter, the casing may be stress relieved with the result that theflattened solder ring 44 is melted and any crevices or unsealed openingsbetween the rivet or stud and the bomb wall are thereby filled.

It is in this manner that moistureproof stud sockets may be provided inthe wall of a bomb casing so that a dry powder charge may be preservedin wet weather and the like. Also, the smooth lines of the bomb casingwill remain substantially unaltered thereby meeting the need forstreamlined bombs.

A further advantageous result which arises in the practice of theinstant method and the apparatus used therefor, is that a plurality ofstud sockets may be contemporaneously formed and secured to thestreamlined bomb thus permitting of more rapid large scale production.

It will be understood that modifications and variations may be effectedwithout departing from the novel concepts of the present invention.

I claim as my invention:

1. An expansible anvil for positioning and expanding within a bombcasing to rigidly back up the same during concurrent countersinking andpunching operations comprising: a lower member having an upper inclinedportion which extends from one end of said member, said inclined portioncomprised of two upper flat portions which if extended would be mutuallycoplanar, said flat portions being spaced each from the other andseparated therefrom by an integral key of constant cross sectional areawhich extends up and down said inclined portion from one end thereof tothe other, a lower portion of said lower member beneath said inclinedportion thereof being cylindrical so as to mate the cylindrical innersurface of said bomb casing; an upper member having a lower inclinedportion which extends from one end of said upper member, said lowerinclined portion being comprised of two lower flat portions which ifextended would be mutually coplanar, said lower fiat portions be ingspaced each from the other and separated therefrom by a slot of constantcross sectional area which extends up and down said lower inclinedportion from one end thereof to the other, said slot mating said key toguide the same and permit said two upper flat portions to abut againstsaid two lower fiat portions, an upper portion of said upper memberabove said lower inclined portion thereof being cylindrical so as tomate said cylindrical inner surface of said bomb casing, said upperportion of said upper member having the desired countersink cavities andpunch slug accommodating cavities; said upper member having an extensionon the end opposite said lower inclined portion, said extension beingadapted to protrude through the nose opening of said bomb casing; saidlower member having an extension on the end opposite said upper inclinedportion, the latter extension being adapted to protrude through the baseopening of said bomb casing; whereby, incident to anvil assembly, firstsaid upper member is admitted through said base opening and then saidlower member is so admitted, the members mating and wedging together toform said anvil in said bomb casing with the aforesaid extensionsprotruding therefrom.

2. An expansible anvil as in claim 1 wherein said concurrent operationsare rivet flattening and hole punching in the rivets and wherein saidpunch slug cavities are replaced by frusto-conical rivet holdingcavities with the smaller ends thereof at the bottoms and the largerends of said rivet holding cavities being larger than the holespreviously punched through said bomb casing, the latter holes beingreadily alignable with said frusto-conical cavities so rivets may beinstalled on said bomb casing while using said expansible anvil as arigid backing.

References Qited in the file of this patent UNITED STATES PATENTS110,695 Tonham Jan. 3, 1871 452,482 Robischung May 19, 1891 747,583Boyle et al. Dec. 22, 1903 916,991 Brinckmann Apr. 6, 1909 1,190,803Rosenfeld July 11, 1916 1,207,948 Long Dec. 12, 1916 1,264,854 PossonsApr. 30, 1918 1,305,974 Pearne June 3, 1919 1,355,434 Sultemeyer Oct.12, 1920 1,442,481 Lassiter et al. Jan. 16, 1923 1,516,762 Decker Nov.25, 1924 1,625,854 Holt Apr. 26, 1927 1,678,451 Taylor July 24, 19281,884,914 Taylor Oct. 25, 1932 1,962,543 Wilson June 12, 1934 2,216,403Oeckl Oct. 1, 1940 2,268,787 Wales Jan. 6, 1942 2,288,378 Veit June 30,1942 2,356,526 Mayer Aug. 22, 1944 2,367,121 Hill Jan. 9, 1945 2,695,062Taylor Nov. 24, 1954 FOREIGN PATENTS 11,969 Great Britain AD. 1847749,761 Germany Dec. 4, 1944 800,271 Germany Oct. 25, 1950

